Presence of accessory coracobrachialis and its clinical importance – a case report

Introduction Coracobrachialis is a weak flexor muscle of the arm. It originates from the tip of the coracoid process of scapula together with the short head of biceps brachii. Its tendon is inserted to the middle of the medial border of humerus where the nutrient foramen is located. The musculocutaneous nerve usually pierces the muscle and supplies it [1, 2]. This muscle is functionally not so important in the arm and is said to be a weak flexor and adductor of the arm. Coracobrachialis is known to show variations [3, 4]. The variations reported include the presence of accessory slips that get attached to medial epicondyle, medial supracondylar ridge, lesser tubercle and the medial intermuscular septum. We saw an accessory coracobrachialis muscle which is quite unique in its attachments and has not been reported yet.